Contiv multi-master and other fixes

Contiv's etcd was not being deployed correctly when using more than
one master.  To make it easier to manage, it has been moved into a
k8s container.

The api proxy was hardcoded to an old version (1.1.1), and in some
environments would run into a docker error.  This has been moved into
a k8s container for easier management.

The firewall was too permissive on several ports.  Many were open to
the world when they should have only been accessible inside the
cluster.

Many of the contiv role variables were not prefixed with 'contiv',
which may end up clobbering variables from another role.  Now all the
contiv specific role variables start with 'contiv_'.

The api proxy's default self-signed certificate was bundled with the
role.  This means someone with read-only MITM access and this key
could decrypt traffic.  Granted a user defined certificate from a
trusted CA should be used in a production environment, it is still
better to generate one in each environment when one is not provided.

1 files changed, 28 insertions, 23 deletions

diff --git a/roles/contiv/tasks/netmaster_iptables.yml b/roles/contiv/tasks/netmaster_iptables.yml
index c98e7b6a5..3b68ea0c3 100644
--- a/roles/contiv/tasks/netmaster_iptables.yml
+++ b/roles/contiv/tasks/netmaster_iptables.yml
@@ -1,27 +1,32 @@
 ---
-- name: Netmaster IPtables | Get iptables rules
-  command: iptables -L --wait
-  register: iptablesrules
-  check_mode: no
-
-- name: Netmaster IPtables | Enable iptables at boot
-  service:
-    name: iptables
-    enabled: yes
-    state: started
-
-- name: Netmaster IPtables | Open Netmaster with iptables
-  command: /sbin/iptables -I INPUT 1 -p tcp --dport {{ item }} -j ACCEPT -m comment --comment "contiv"
-  with_items:
-    - "{{ contiv_rpc_port1 }}"
-    - "{{ contiv_rpc_port2 }}"
-    - "{{ contiv_rpc_port3 }}"
-  when: iptablesrules.stdout.find("contiv") == -1
+- name: Netmaster IPtables | Add internal rules
+  iptables:
+    action: insert
+    chain: INPUT
+    # Parsed from the contiv_netmaster_internal list, this will be tcp or udp.
+    protocol: "{{ item[0].split('/')[1] }}"
+    match: "{{ item[0].split('/')[1] }}"
+    # Parsed from the contiv_netmaster_internal list, this will be a port number.
+    destination_port: "{{ item[0].split('/')[0] }}"
+    # This is an IP address from a node in the cluster.
+    source: "{{ item[1] }}"
+    jump: ACCEPT
+    comment: contiv
+  with_nested:
+    - "{{ contiv_netmaster_internal }}"
+    - "{{ groups.oo_nodes_to_config|difference(hostvars[inventory_hostname]['ansible_' + contiv_netmaster_interface].ipv4.address)|list }}"
   notify: Save iptables rules
 
-- name: Netmaster IPtables | Open netmaster main port
-  command: /sbin/iptables -I INPUT 1 -p tcp -s {{ item }} --dport {{ netmaster_port }} -j ACCEPT -m comment --comment "contiv"
-  with_items:
-    - "{{ groups.oo_nodes_to_config|difference(hostvars[inventory_hostname]['ansible_' + netmaster_interface].ipv4.address)|list }}"
-  when: iptablesrules.stdout.find("contiv") == -1
+- name: Netmaster IPtables | Add external rules
+  iptables:
+    action: insert
+    chain: INPUT
+    # Parsed from the contiv_netmaster_external list, this will be tcp or udp.
+    protocol: "{{ item.split('/')[1] }}"
+    match: "{{ item.split('/')[1] }}"
+    # Parsed from the contiv_netmaster_external list, this will be a port number.
+    destination_port: "{{ item.split('/')[0] }}"
+    jump: ACCEPT
+    comment: contiv
+  with_items: "{{ contiv_netmaster_external }}"
   notify: Save iptables rules